Soft package battery module for electric motorcycle

Abstract

The utility model relates to the technical field of soft package battery module, and specifically discloses a kind of soft package battery module for electric motorcycle, including shell assembly, electric core subassembly, sampling subassembly and management subassembly, shell assembly includes lower shell and upper cover, upper cover and lower shell form containing cavity, electric core module is fixed with the lower part of containing cavity, sampling subassembly includes the sampling board in containing cavity, management subassembly includes BMS support and BMS, the sampling board is fixed in the top of electric core module, and with electric core module electric connection, and sampling board is equipped with the connecting stud of vertical extension, BMS support is fixed in the top of sampling board, and BMS support is equipped with the via hole for connecting stud to pass through, BMS is fixed on BMS support, sampling board can be electrically connected with BMS by connecting stud, can avoid the short-circuit risk caused by traditional sampling wire harness scheme, also can avoid the problem that the pole lug overcurrent area of electric core is small due to integrated design, meet high rate discharge demand.

Description

Technical Field

[0001] This utility model relates to the technical field of soft-pack battery modules, and specifically to a soft-pack battery module for electric motorcycles. Background Technology

[0002] Driven by the national dual-carbon strategy and new energy policies, electrification has become an important issue in the energy and transportation sectors. As an important vehicle in the transportation sector, motorcycles are undergoing an increasingly rapid electrification transformation. Unlike traditional electric bicycles, electric motorcycles require higher output power and higher energy density, while also ensuring high safety. Soft-pack batteries, compared to similar prismatic and cylindrical batteries, have higher energy density and safety, making them the most suitable energy carrier for electric motorcycles.

[0003] There are two main design approaches for existing soft-pack battery packs used in electric motorcycles. One is the traditional separate sampling and BMS design, where the sampling device and BMS are connected via a sampling harness. This design is complex and costly, and there is a risk of short circuits if the harness protection is inadequate. The other is an integrated sampling device and BMS design, which greatly simplifies the traditional design. However, due to size and space limitations, the cell tabs cannot be too long or need to be cut short to allow the BMS to arrange components. This structure, due to the small overcurrent area of ​​the tabs, cannot meet the requirements of high-rate discharge applications. Furthermore, existing soft-pack battery packs are prone to thermal runaway, resulting in low safety. Utility Model Content

[0004] This utility model addresses the aforementioned problems and aims to provide a soft-pack battery module for electric motorcycles. It allows for direct connection between the sampling board and the BMS using connecting studs, making installation convenient, avoiding short circuits caused by wiring harnesses, and not occupying space for the tabs. It meets the requirements for high-rate discharge, has good heat dissipation, and is highly safe.

[0005] To achieve the above objectives, this utility model provides a soft-pack battery module for electric motorcycles, comprising:

[0006] A housing assembly, comprising a lower housing and an upper cover, wherein the upper cover and the lower housing together form a receiving cavity;

[0007] The battery cell module is fixed inside the receiving cavity;

[0008] The sampling assembly includes a sampling plate, a BMS bracket, and a BMS located within the receiving cavity. The sampling plate is fixed above the battery cell module and electrically connected to the battery cell module. The sampling plate is provided with connecting studs.

[0009] The management component includes a BMS bracket and a BMS located within the receiving cavity. The BMS bracket is fixed above the sampling plate, and the BMS bracket has a through hole for the connecting stud to pass through. The BMS is fixed on the BMS bracket.

[0010] The sampling board can be electrically connected to the BMS via the connecting studs.

[0011] According to the above-described soft-pack battery module for electric motorcycles, the BMS is provided with a first fixing hole, the upper end of the connecting stud can pass through the through hole and extend into the first fixing hole, and the through hole is set as a waist hole or the diameter of the through hole is larger than the diameter of the connecting stud.

[0012] According to the above-described soft-pack battery module for electric motorcycles, the battery module includes a module bracket and multiple battery cells. The multiple battery cells are stacked sequentially on the module bracket through series and / or parallel connections. The sampling plate is fixed to the top of the module bracket, and the sampling plate is electrically connected to the tabs of the multiple battery cells.

[0013] According to the above-described soft-pack battery module for electric motorcycles, the module bracket is provided with a plurality of second fixing holes and a positioning post, and the positioning post is located between the second fixing holes;

[0014] The sampling plate is provided with a third fixing hole and a positioning hole. When the sampling plate is fixed to the module bracket, the third fixing hole is connected to the second fixing hole, and the positioning post can extend into the positioning hole.

[0015] According to the above-described soft-pack battery module for electric motorcycles, a fourth fixing hole is provided at the corner of the module bracket, and a fifth fixing hole is provided at the corner of the BMS bracket, with the plurality of fifth fixing holes corresponding one-to-one with the plurality of fourth fixing holes;

[0016] Furthermore, the BMS bracket is provided with multiple sixth fixing holes, and the BMS is provided with multiple seventh fixing holes, with each of the multiple seventh fixing holes corresponding to one of the multiple sixth fixing holes.

[0017] According to the above-described soft-pack battery module for electric motorcycles, the battery cell module is provided with buffer foam and insulating sheets. The buffer foam is arranged in the battery cell module along the stacking direction of the plurality of battery cells, and the insulating sheets are arranged on both sides of the battery cell module.

[0018] The above-described soft-pack battery module for electric motorcycles further includes a heat dissipation component. The heat dissipation component includes a thermally conductive silicone pad and a thermally conductive sheet. The thermally conductive silicone pad is attached to the heat-generating area of ​​the BMS. The thermally conductive sheet is fixed to the inner side of the upper cover and can abut against the thermally conductive silicone pad. Thermally conductive adhesive is provided between the thermally conductive sheet and the upper cover.

[0019] According to the above-described soft-pack battery module for electric motorcycles, the upper cover is provided with a first heat dissipation area, the first heat dissipation area is provided with a plurality of heat dissipation ribs, the plurality of heat dissipation ribs protrude from the upper surface of the upper cover, and the heat-conducting sheet is located directly below the first heat dissipation area.

[0020] According to the above-described soft-pack battery module for electric motorcycles, the upper cover is provided with a second heat dissipation area, the second heat dissipation area is configured as a groove, the groove is provided with a plurality of vent holes, the vent holes are connected to the receiving cavity, and the inner side of the upper cover is provided with a waterproof and breathable membrane, which covers the vent holes.

[0021] According to the above-described soft-pack battery module for electric motorcycles, the top cover is also provided with a handle and a label. The label is adhered to the groove, and the handle is detachably fixed to the top cover.

[0022] This utility model has the following beneficial effects:

[0023] 1. The integrated connection is achieved through the connecting studs on the sampling board, the through holes of the BMS bracket, and the first fixing hole of the BMS, which replaces the traditional sampling harness solution, avoids the risk of sampling short circuit, and at the same time retains the overcurrent area of ​​the battery cell tab to meet the high-rate discharge requirements, simplifying assembly, reducing costs, and improving production efficiency and structural reliability.

[0024] 2. By placing thermally conductive silicone pads and thermally conductive sheets between the heat-generating area of ​​the BMS and the top cover, and combining them with the heat dissipation fins on the top cover, the heat generated by the BMS can be quickly dissipated, improving the overall heat dissipation performance.

[0025] 3. By setting multiple vents on the top cover, and in conjunction with a waterproof and breathable membrane and label design, high-temperature gases can be quickly discharged in the event of thermal runaway, suppressing the spread of open flames and significantly reducing the risk of fire and explosion. At the same time, it maintains the same air pressure inside and outside the battery pack while isolating moisture. Attached Figure Description

[0026] Figure 1 This is an exploded view of the overall structure of the embodiment;

[0027] Figure 2 This is a partial exploded view of the embodiment;

[0028] Figure 3 This is a schematic diagram of the upper cover structure of an embodiment;

[0029] Figure 4 This is a schematic diagram of the assembly structure of the management component and the heat dissipation component in an embodiment;

[0030] Figure 5 This is a schematic diagram of the assembly of the sampling component and the module bracket in an embodiment.

[0031] In the picture:

[0032] 100. Housing assembly; 110. Lower shell; 120. Upper cover; 121. First heat dissipation area; 121a. Heat dissipation ribs; 122. Second heat dissipation area; 122a. Vent; 124. Handle; 125. Label;

[0033] 200. Battery cell module; 210. Module bracket; 211. Second fixing hole; 212. Positioning post; 213. Fourth fixing hole; 220. Battery cell; 230. Buffer foam; 240. Insulating sheet;

[0034] 300. Sampling assembly; 310. Sampling plate; 311. Connecting stud; 312. Third fixing hole; 313. Positioning hole;

[0035] 400. Heat dissipation component; 410. Thermal pad; 420. Thermal pad;

[0036] 500, Management component; 510, BMS bracket; 511, Through hole; 512, Fifth mounting hole; 513, Sixth mounting hole; 520, BMS; 521, First mounting hole; 522, Seventh mounting hole. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0038] like Figure 1-5 As shown, a soft-pack battery module for electric motorcycles includes a housing assembly 100, a cell module 200, a sampling component 300, a heat dissipation component 400, and a management component 500. The housing assembly 100 includes a lower shell 110 and an upper cover 120, which together form a receiving cavity. The cell module 200, the sampling component 300, and the heat dissipation component 400 are all located within this receiving cavity. That is, the housing assembly 100 is used to provide protection for the cell module 200, the sampling component 300, the heat dissipation component 400, and the management component 500.

[0039] The battery cell module 200 is fixed to the lower part of the receiving cavity. The sampling assembly 300 includes a sampling plate 310 located within the receiving cavity. The management assembly 500 includes a BMS bracket 510 and a BMS 520 located within the receiving cavity. The sampling plate 310 is fixed above the battery cell module 200 and electrically connected to it. The sampling plate 310 has vertically extending connecting studs 311. The BMS bracket 510 is fixed above the sampling plate 310 and has through holes 511 for the connecting studs 311 to pass through. The BMS 520 is fixed on the BMS bracket 510. The sampling plate 310... The sampling board 310 can be electrically connected to the BMS520 via the connecting stud 311. The sampling board 310 is used to collect information from the battery cell module 200, including multiple key parameters such as voltage and temperature. After collection, the information is fed back to the BMS520 via the connecting stud 311 and analyzed and managed by the BMS520. In this embodiment, since the sampling board is directly electrically connected to the BMS520 via the connecting stud 311, the short circuit risk caused by the traditional sampling harness scheme can be avoided. At the same time, the problem of small overcurrent area of ​​the battery cell 220 tab caused by the integrated design can also be avoided, meeting the high-rate discharge requirements, simplifying assembly, and reducing costs.

[0040] Furthermore, to achieve the connection between the BMS520 and the connecting stud 311, a first fixing hole 521 is provided on the BMS520. The upper end of the connecting stud 311 can pass through the through hole 511 and extend into the first fixing hole 521. Moreover, the size of the first fixing hole 521 matches the diameter of the connecting stud 311, ensuring the positioning of the connecting stud 311 and also ensuring the connection between the BMS520 and the connecting stud 311. This enables the electrical connection between the acquisition board and the BMS520. However, since the first fixing hole 521 cannot be guaranteed to be fully fixed... The connecting stud 311 can be precisely inserted each time. However, if there is a deviation, the connecting stud 311 is easily squeezed. If the diameter of the through hole 511 is the same as that of the connecting stud 311, it will cause the connecting stud 311 to squeeze the side wall of the through hole 511, which will cause the BMS bracket 510 to bear corresponding stress and cause certain damage. Therefore, in this embodiment, the through hole 511 is set as a waist hole or the diameter of the through hole 511 is set to be larger than the diameter of the connecting stud 311. When the connecting stud 311 moves to the side, it can avoid squeezing the side wall of the through hole 511.

[0041] Furthermore, the battery cell module 200 includes a module support 210 and multiple battery cells 220. The multiple battery cells 220 are stacked sequentially on the module support 210 through series and / or parallel connections. A sampling board 310 is fixed to the top of the module support 210 and is electrically connected to the tabs of the multiple battery cells 220. The module support 210 provides support and positioning for the multiple battery cells 220. The multiple battery cells 220 can be assembled into a battery cell module 200 on the module support 210, and the sampling board can collect information from all the battery cells 220 and feed it back to the BMS520.

[0042] Furthermore, the cell module 200 is provided with buffer foam 230 and insulating sheet 240. The buffer foam 230 is arranged in the cell module 200 along the stacking direction of multiple cells 220, and the insulating sheet 240 is arranged on both sides of the cell module 200. The buffer foam 230 can absorb the impact force when the cell module 200 is subjected to external impact, protecting the cells 220 from damage, while the insulating sheet 240 is used to prevent the cells 220 from contacting external metal parts and causing a short circuit.

[0043] Furthermore, to achieve the positioning of the sampling board 310, multiple second fixing holes 211 and positioning posts 212 are provided on the module bracket 210. In this embodiment, two second fixing holes 211 are located at both ends of the middle region of the module bracket 210, and the positioning post 212 is located between the two second fixing holes 211. The sampling board 310 is provided with third fixing holes 312 and positioning holes 313. Since the size of the sampling board 310 does not need to be too large, and is usually smaller than the size of the module bracket 210, the sampling board 310 only needs to be arranged in the middle region of the module bracket 210 along the stacking direction of the multiple cells 220. By contacting the tabs of each battery cell 220, information from each battery cell 220 is collected. When the sampling board 310 is fixed to the module bracket 210, the two third fixing holes 312 are connected to the two second fixing holes 211 respectively. The positioning pin 212 can be inserted into the positioning hole 313. During the fixing process of the sampling board 310, the positioning pin 212 and the positioning hole 313 can be used for preliminary positioning. Then, a pin is inserted into the connecting hole between the third fixing hole 312 and the second fixing hole 211 to achieve complete positioning. This is equivalent to positioning both ends of the sampling board 310 at the same time, which can ensure the stability of the positioning and prevent the sampling board 310 from shifting.

[0044] Furthermore, to achieve the positioning of the BMS bracket 510 and the BMS 520, a fourth fixing hole 213 is provided at each corner of the module bracket 210, and a fifth fixing hole 512 is provided at each corner of the BMS bracket 510. The multiple fifth fixing holes 512 correspond one-to-one with the multiple fourth fixing holes 213. A pin can be inserted into the connecting hole between the fifth fixing hole 512 and the fourth fixing hole 213 to fix the BMS bracket 510 to the module bracket 210. The BMS bracket 510 also has multiple sixth fixing holes 513, and the BMS 520 also has multiple seventh fixing holes 522. The multiple seventh fixing holes 522 correspond one-to-one with the multiple sixth fixing holes 513. Similarly, a pin can be inserted into the connecting hole between the seventh fixing hole 522 and the sixth fixing hole 513 to fix the BMS 520 to the BMS bracket 510.

[0045] In this embodiment, the overall installation is relatively simple and the stability of the overall structure can be guaranteed.

[0046] Specifically, the heat dissipation component 400 includes a thermally conductive silicone pad 410 and a thermally conductive sheet 420. The thermally conductive silicone pad 410 is attached to the heat-generating area of ​​the BMS520, and the thermally conductive sheet 420 is fixed to the inside of the upper cover 120 by screws or welding, and can abut against the thermally conductive silicone pad 410. Thermally conductive adhesive is provided between the thermally conductive sheet 420 and the upper cover 120. The heat generated by the BMS520 is concentrated in its heat-generating area. If heat is conducted through conventional air, only a small portion of the heat can be conducted to the upper cover 120, and the conduction efficiency is very low. The overall heat dissipation effect is very poor. In this embodiment, the heat generated by the BMS520 is first transferred to the thermally conductive silicone pad 410, and then from the thermally conductive silicone pad 410 to the thermally conductive sheet 420, and finally from the thermally conductive sheet 420 to the top cover 120. This method of transferring heat through the thermally conductive silicone pad 410 and the thermally conductive sheet 420 greatly improves the heat dissipation efficiency, allowing most of the heat to be dissipated in time, avoiding damage to the BMS520 or safety accidents caused by heat accumulation, and improving the overall safety performance.

[0047] Furthermore, to further improve the overall heat dissipation effect, a first heat dissipation area 121 is provided on the top cover 120. The first heat dissipation area 121 is provided with multiple heat dissipation ribs 121a, all of which protrude from the upper surface of the top cover 120. The heat-conducting sheet 420 is located directly below the first heat dissipation area 121. The presence of the heat dissipation ribs 121a can increase the contact area between the top cover 120 and the air. When the battery module is working, the heat generated by the BMS520 is first transferred to the thermal conductive silicone pad 410, and then transferred to the first heat dissipation area 121 of the top cover 120 through the thermal conductive sheet 420. Finally, it is dissipated into the external space through the heat dissipation ribs 121a, further improving the heat dissipation efficiency of the BMS520.

[0048] Furthermore, a second heat dissipation area 122 is provided on the top cover 120. This second heat dissipation area 122 is located on one side of the first heat dissipation area 121. The second heat dissipation area 122 is used for immediate and rapid heat dissipation in the event of thermal runaway. The second heat dissipation area 122 is a groove with multiple vent holes 122a inside. The vent holes 122a communicate with the receiving cavity. When thermal runaway occurs inside the battery module, the hot air can be quickly discharged through the vent holes 122a, reducing the risk of fire and explosion caused by thermal runaway. At the same time, a waterproof and breathable membrane is provided on the inner side of the top cover 120. A waterproof and breathable membrane is attached to the inside of the top cover 120 and covers all the vent holes 122a. The waterproof and breathable membrane can prevent moisture from entering the cavity and ensure the dryness of the battery module, while also allowing ventilation. The top cover 120 is also equipped with a label 125, which is adhered to the bottom of the groove with adhesive. This label 125 can also seal the vent holes 122a to prevent water from entering them. In the event of thermal runaway, the air temperature rises and the gas pressure also rises. The gas can then break through the label 125 for rapid venting.

[0049] Furthermore, a handle 124 is provided on the top cover 120. The handle 124 is detachably fixed to the top of the top cover 120. The purpose of the handle 124 is to facilitate the lifting and carrying of the battery module.

[0050] In this embodiment, a soft-pack battery module for electric motorcycles is disclosed, including a housing assembly 100, a cell assembly 220, a sampling assembly 300, and a management assembly 500. The housing assembly 100 includes a lower shell 110 and an upper cover 120, which together form a receiving cavity. The cell module 200 is fixed to the lower part of the receiving cavity. The sampling assembly 300 includes a sampling plate 310 located within the receiving cavity. The management assembly 500 includes a BMS bracket 510 and a BMS 520. The sampling plate 310 is fixed above the cell module 200 and electrically connected to it. The sampling plate 310 is provided with... A vertically extending connecting stud 311 and a BMS bracket 510 are fixed above the sampling plate 310. The BMS bracket 510 has a through hole 511 for the connecting stud 311 to pass through. The BMS 520 is fixed on the BMS bracket 510. The sampling plate 310 can be electrically connected to the BMS 520 through the connecting stud 311. Since the sampling plate is directly electrically connected to the BMS 520 through the connecting stud 311, the short circuit risk caused by the traditional sampling harness solution can be avoided. At the same time, the problem of small overcurrent area of ​​the battery cell 220 tab caused by the integrated design can also be avoided, meeting the high-rate discharge requirements, simplifying assembly, and reducing costs.

[0051] The technical solution of this utility model has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of this utility model. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0052] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0053] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A soft-pack battery module for electric motorcycles, characterized in that, include: A housing assembly, comprising a lower housing and an upper cover, wherein the upper cover and the lower housing together form a receiving cavity; The battery cell module is fixed inside the receiving cavity; A sampling assembly includes a sampling plate located within the receiving cavity, the sampling plate being fixed above the battery cell module and electrically connected to the battery cell module, and the sampling plate being provided with connecting studs; The management component includes a BMS bracket and a BMS located within the receiving cavity. The BMS bracket is fixed above the sampling plate, and the BMS bracket has a through hole for the connecting stud to pass through. The BMS is fixed on the BMS bracket. The sampling board can be electrically connected to the BMS via the connecting studs.

2. The soft-pack battery module for electric motorcycles according to claim 1, characterized in that, The BMS is provided with a first fixing hole, and the upper end of the connecting stud can pass through the through hole and extend into the first fixing hole. The through hole is a waist hole or the diameter of the through hole is larger than the diameter of the connecting stud.

3. The soft-pack battery module for electric motorcycles according to claim 1, characterized in that, The battery cell module includes a module bracket and multiple battery cells. The multiple battery cells are stacked sequentially on the module bracket through series and / or parallel connections. The sampling plate is fixed to the top of the module bracket and is electrically connected to the tabs of the multiple battery cells.

4. A soft-pack battery module for electric motorcycles according to claim 3, characterized in that, The module bracket is provided with multiple second fixing holes and positioning posts, and the positioning posts are located between the second fixing holes; The sampling plate is provided with a third fixing hole and a positioning hole. When the sampling plate is fixed to the module bracket, the third fixing hole is connected to the second fixing hole, and the positioning post can extend into the positioning hole.

5. A soft-pack battery module for electric motorcycles according to claim 3 or 4, characterized in that, The module bracket is provided with a fourth fixing hole at each corner, and the BMS bracket is provided with a fifth fixing hole at each corner. The plurality of fifth fixing holes correspond one-to-one with the plurality of fourth fixing holes. Furthermore, the BMS bracket is provided with multiple sixth fixing holes, and the BMS is provided with multiple seventh fixing holes, with each of the multiple seventh fixing holes corresponding to one of the multiple sixth fixing holes.

6. A soft-pack battery module for electric motorcycles according to claim 3, characterized in that, The battery cell module is provided with buffer foam and insulating sheets. The buffer foam is arranged in the battery cell module along the stacking direction of the multiple battery cells, and the insulating sheets are arranged on both sides of the battery cell module.

7. A soft-pack battery module for electric motorcycles according to claim 1, characterized in that, It also includes a heat dissipation component, which includes a thermally conductive silicone pad and a thermally conductive sheet. The thermally conductive silicone pad is attached to the heat-generating area of ​​the BMS, and the thermally conductive sheet is fixed to the inside of the upper cover and can abut against the thermally conductive silicone pad. Thermally conductive adhesive is provided between the thermally conductive sheet and the upper cover.

8. A soft-pack battery module for electric motorcycles according to claim 7, characterized in that, The upper cover is provided with a first heat dissipation area, and the first heat dissipation area is provided with a plurality of heat dissipation ribs, all of which protrude from the upper surface of the upper cover. The heat-conducting sheet is located directly below the first heat dissipation area.

9. A soft-pack battery module for electric motorcycles according to claim 1, characterized in that, The upper cover is provided with a second heat dissipation area, which is a groove. The groove has multiple vent holes, which are connected to the receiving cavity. The upper cover has a waterproof and breathable membrane on the inside, which covers the vent holes.

10. A soft-pack battery module for electric motorcycles according to claim 9, characterized in that, The top cover is also provided with a handle and a label, the label being detachably fixed to the top cover via the groove and the handle.

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